This series adds basic support for the QSEECOM interface used to communicate with secure applications running in the TrustZone on certain Qualcomm devices. In addition to that, it also provides a driver for "uefisecapp", the secure application managing access to UEFI variables on such platforms. For a more detailed description, see the blurb of v1, which can be found at https://lore.kernel.org/lkml/20220723224949.1089973-1-luzmaximilian@xxxxxxxxx/. This series depends on the following series: - "efi: efivars: drop kobject from efivars_register()" (https://lore.kernel.org/lkml/20230117124310.16594-1-johan+linaro@xxxxxxxxxx/) - "efi: verify that variable services are supported" (https://lore.kernel.org/lkml/20230119164255.28091-1-johan+linaro@xxxxxxxxxx/) with subsequent fix "efivarfs: fix NULL-deref on mount when no efivars" (https://lore.kernel.org/lkml/20230126112129.4602-1-johan+linaro@xxxxxxxxxx/) which have all been included in the "next" branch of https://git.kernel.org/pub/scm/linux/kernel/git/efi/efi.git Changes in v2: - Bind the qseecom interface to a device. - Establish a device link between the new qseecom device and the SCM device to ensure proper PM and remove ordering. - Remove the compatible for uefisecapp. Instead, introduce a compatible for the qseecom device. This directly reflects ACPI tables and the QCOM0476 device described therein, which is responsible for the secure app / qseecom interface (i.e., the same purpose). Client devices representing apps handled by the kernel (such as uefisecapp) are now directly instantiated by the qseecom driver, based on the respective platform-specific compatible. - Rename the base name (qctree -> qseecom) to allow differentiation between old (qseecom) and new (smcinvoke) interfaces to the trusted execution environment. This directly reflects downstream naming by Qualcomm. Maximilian Luz (4): firmware: qcom_scm: Export SCM call functions firmware: Add support for Qualcomm Secure Execution Environment SCM interface dt-bindings: firmware: Add Qualcomm QSEECOM interface firmware: Add support for Qualcomm UEFI Secure Application .../bindings/firmware/qcom,qseecom.yaml | 49 ++ MAINTAINERS | 14 + drivers/firmware/Kconfig | 31 + drivers/firmware/Makefile | 2 + drivers/firmware/qcom_qseecom.c | 323 ++++++++ drivers/firmware/qcom_qseecom_uefisecapp.c | 746 ++++++++++++++++++ drivers/firmware/qcom_scm.c | 118 ++- drivers/firmware/qcom_scm.h | 47 -- include/linux/qcom_qseecom.h | 190 +++++ include/linux/qcom_scm.h | 49 ++ 10 files changed, 1483 insertions(+), 86 deletions(-) create mode 100644 Documentation/devicetree/bindings/firmware/qcom,qseecom.yaml create mode 100644 drivers/firmware/qcom_qseecom.c create mode 100644 drivers/firmware/qcom_qseecom_uefisecapp.c create mode 100644 include/linux/qcom_qseecom.h -- 2.39.0
